Electrode Having Excellent Weldability Between Electrode Lead and Electrode Tab and Method of Manufacturing the Same

Abstract

A battery includes an electrode tab coated with an insulating layer, and more particularly to an electrode including an electrode current collector coated with an electrode active material, an electrode tab protruding from the electrode current collector, and an insulating layer formed on the electrode tab by coating, wherein the other surface of the electrode tab having the insulating layer formed thereon by coating is welded to an electrode lead.

What is claimed is: 
     
         1 . An electrode comprising:
 an electrode current collector coated with an electrode active material;   an electrode tab protruding from the electrode current collector; and   an insulating layer formed on a first side surface of the electrode tab by coating, wherein a second side surface of the electrode tab is welded to an electrode lead.   
     
     
         2 . The electrode according to  claim 1 , wherein the electrode tab is a non-coated portion comprising no electrode active material layer. 
     
     
         3 . The electrode according to  claim 2 , wherein the insulating layer is formed, by coating, on a portion or an entirety of a total length of the electrode tab in a protruding direction of the electrode tab. 
     
     
         4 . The electrode according to  claim 2 , wherein the insulating layer is formed by coating so as to have a width equal to a width of the electrode tab perpendicular to a protruding direction of the electrode tab. 
     
     
         5 . The electrode according to  claim 1 , wherein the electrode tab comprises a portion of the electrode active material layer. 
     
     
         6 . The electrode according to  claim 5 , wherein the insulating layer comprises a portion or an entirety of the electrode active material, and is formed, by coating, on a portion or an entirety of a total length of the electrode tab in a protruding direction of the electrode tab. 
     
     
         7 . The electrode according to  claim 5 , wherein the insulating layer is formed by coating so as to have a width equal to a width of the electrode tab perpendicular to a protruding direction of the electrode tab. 
     
     
         8 . A secondary battery comprising the electrode according to  claim 1 . 
     
     
         9 . The secondary battery according to  claim 8 , wherein the secondary battery is a cylindrical, prismatic, or pouch-shaped secondary battery.